Doing the trade for a friend, he's modding on a budget and AR's aren't for him

Modding on a budget? I wound budget on performance parts. Is gonna be more expensive at the end of the day. My 2c

I've dealt with a lot of different performance parts for this car and have tried quite a few different kinds on my personal car.... the AR's don't fit his bill since he he wants "X" amount of performance for "Y" amount of dollars... So I plan to save him a couple bucks on the downpipes to spend elsewhere where the real gains will come from.